Improvement in thread-cutters for sewing-machines



G. l. HENRY 8:. C. l. WOOD.

Thread-Guttgr s for Sewing-Machines. No. 138,153. PatentedAprH22J873 AM. PHOTU-UTHUGRAFHIC 00 N1 (osaoma's mucsss) UNITED STATES PATENT OFEIcE.

CHARLES J. HENRY AND CORNELL J. WOOD, OF TUNKHANNOOK, PA.

IMPROVEMENT IN THREAD-CUTTERS FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 138,153, dated April 22, 1873; application filed February 18, 1873.

To all whom it may concern:

Be it known that We, 0. J. HENRY and O. J. WOOD, 0f Tunkhannock, county of Wyoming and State of Pennsylvania, have invented certain new and useful Improvements in Thread-Gutters, of which the following is a specification The nature of our invention 'relates to the construction of a thread-cutter for sewing-machines; and consists in a concavo-convex steel button partly sunk into the frame, and under which the under thread catches and is broken in the act of drawing the work back from the needle, as will be more fully set forth hereafter.

Figure 1 represents a plan view of our invention. Fig. 2 is a sectional view of the same.

(t represents a concavo-convex steel button secured by a screw, 0, in an inclined recess so that a part of its edge will project above the top of the frame b. It is secured at a convenient distance from in front of the needle-hole, either to the needle-plate, slide, or any other part of the machine, so that in drawing back the work the thread will catch under the projecting edge and be broken. The edges of the button are square and on a plane, or nearly so, with the center, and when the thread catches under them it is flattened against the plate so as to be very easily broken.

Should one part of the edge become duIl, the button can be turned so as to present another part.

By slightly loosening the screw the button will revolve and roll the thread onto the square edge of the depression, and thus break it over the edge.

This device is very simple, cheap, and effective' The end of the lower thread remains caught under the button, and in this position is ready to lock with the upper at the first stroke of the needle.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, isa The combination of the button and plate, so arranged that one side of the button shall extend above the surface of the plate, for the purpose of forming a cutting device, substantially as shown and described. I

- In testimony that we claim the foregoing as our invention we hereunto affix our signatures this 15th day of February, 1873.

CHARLES J. HENRY. CORNELL J. WOOD.

Witnesses JAMES M. KELLEY, P. O. BURNS. 

